Rhode Island General Laws Title 2. Agriculture and Forestry § 2-20-15. Grading of soft pine

(1) The first sort shall be denominated number 1 and marked I, and includes boards free from sap, rot, knots, shakes and splits, not less than one inch thick, square-edged, and contains not less than sixteen (16) feet in quantity.

(2) The second sort shall be denominated number 2 and marked II. Lumber of this sort does not have over one inch sap on the edges and is free from shakes, rot and knots, square-edged, and not less than seven-eighths ( 7/8 ) of an inch thick.

(3) The third sort shall be denominated number 3 and marked III. Lumber of this sort shall be free from rot and shakes and nearly free from sap and knots.

(4) The fourth sort shall be denominated number 4 and marked IV. Lumber of this sort is free from rot, shakes and large knots, suitable for cheap finish and dressing lumber.

(5) The fifth sort shall be denominated number 5 and marked V. Lumber of this sort is square-edged, free from rot and shakes and suitable for barn and box boards.

(6) The sixth sort shall be denominated number 6 and marked X. Lumber of this sort is not required to be square edged, and may have rot, shakes, knots and sap.